IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.78.95.128/25

network10.78.95.128/25

broadcast10.78.95.255

first host10.78.95.129

last host10.78.95.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.78.95.128/25

address00001010.01001110.01011111.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.01001110.01011111.10000000

broadcast00001010.01001110.01011111.11111111

green = network part, grey = host part

hex0x0a4e5f80

decimal172908416

reverse dns128.95.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:5f80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.78.95.128/32	10.78.95.128 – 10.78.95.128	10.78.95.128
2	10.78.95.129/32	10.78.95.129 – 10.78.95.129	10.78.95.129
3	10.78.95.130/32	10.78.95.130 – 10.78.95.130	10.78.95.130
4	10.78.95.131/32	10.78.95.131 – 10.78.95.131	10.78.95.131
5	10.78.95.132/32	10.78.95.132 – 10.78.95.132	10.78.95.132
6	10.78.95.133/32	10.78.95.133 – 10.78.95.133	10.78.95.133
7	10.78.95.134/32	10.78.95.134 – 10.78.95.134	10.78.95.134
8	10.78.95.135/32	10.78.95.135 – 10.78.95.135	10.78.95.135
9	10.78.95.136/32	10.78.95.136 – 10.78.95.136	10.78.95.136
10	10.78.95.137/32	10.78.95.137 – 10.78.95.137	10.78.95.137
11	10.78.95.138/32	10.78.95.138 – 10.78.95.138	10.78.95.138
12	10.78.95.139/32	10.78.95.139 – 10.78.95.139	10.78.95.139
13	10.78.95.140/32	10.78.95.140 – 10.78.95.140	10.78.95.140
14	10.78.95.141/32	10.78.95.141 – 10.78.95.141	10.78.95.141
15	10.78.95.142/32	10.78.95.142 – 10.78.95.142	10.78.95.142
16	10.78.95.143/32	10.78.95.143 – 10.78.95.143	10.78.95.143
17	10.78.95.144/32	10.78.95.144 – 10.78.95.144	10.78.95.144
18	10.78.95.145/32	10.78.95.145 – 10.78.95.145	10.78.95.145
19	10.78.95.146/32	10.78.95.146 – 10.78.95.146	10.78.95.146
20	10.78.95.147/32	10.78.95.147 – 10.78.95.147	10.78.95.147
21	10.78.95.148/32	10.78.95.148 – 10.78.95.148	10.78.95.148
22	10.78.95.149/32	10.78.95.149 – 10.78.95.149	10.78.95.149
23	10.78.95.150/32	10.78.95.150 – 10.78.95.150	10.78.95.150
24	10.78.95.151/32	10.78.95.151 – 10.78.95.151	10.78.95.151
25	10.78.95.152/32	10.78.95.152 – 10.78.95.152	10.78.95.152
26	10.78.95.153/32	10.78.95.153 – 10.78.95.153	10.78.95.153
27	10.78.95.154/32	10.78.95.154 – 10.78.95.154	10.78.95.154
28	10.78.95.155/32	10.78.95.155 – 10.78.95.155	10.78.95.155
29	10.78.95.156/32	10.78.95.156 – 10.78.95.156	10.78.95.156
30	10.78.95.157/32	10.78.95.157 – 10.78.95.157	10.78.95.157
31	10.78.95.158/32	10.78.95.158 – 10.78.95.158	10.78.95.158
32	10.78.95.159/32	10.78.95.159 – 10.78.95.159	10.78.95.159
33	10.78.95.160/32	10.78.95.160 – 10.78.95.160	10.78.95.160
34	10.78.95.161/32	10.78.95.161 – 10.78.95.161	10.78.95.161
35	10.78.95.162/32	10.78.95.162 – 10.78.95.162	10.78.95.162
36	10.78.95.163/32	10.78.95.163 – 10.78.95.163	10.78.95.163
37	10.78.95.164/32	10.78.95.164 – 10.78.95.164	10.78.95.164
38	10.78.95.165/32	10.78.95.165 – 10.78.95.165	10.78.95.165
39	10.78.95.166/32	10.78.95.166 – 10.78.95.166	10.78.95.166
40	10.78.95.167/32	10.78.95.167 – 10.78.95.167	10.78.95.167
41	10.78.95.168/32	10.78.95.168 – 10.78.95.168	10.78.95.168
42	10.78.95.169/32	10.78.95.169 – 10.78.95.169	10.78.95.169
43	10.78.95.170/32	10.78.95.170 – 10.78.95.170	10.78.95.170
44	10.78.95.171/32	10.78.95.171 – 10.78.95.171	10.78.95.171
45	10.78.95.172/32	10.78.95.172 – 10.78.95.172	10.78.95.172
46	10.78.95.173/32	10.78.95.173 – 10.78.95.173	10.78.95.173
47	10.78.95.174/32	10.78.95.174 – 10.78.95.174	10.78.95.174
48	10.78.95.175/32	10.78.95.175 – 10.78.95.175	10.78.95.175
49	10.78.95.176/32	10.78.95.176 – 10.78.95.176	10.78.95.176
50	10.78.95.177/32	10.78.95.177 – 10.78.95.177	10.78.95.177
51	10.78.95.178/32	10.78.95.178 – 10.78.95.178	10.78.95.178
52	10.78.95.179/32	10.78.95.179 – 10.78.95.179	10.78.95.179
53	10.78.95.180/32	10.78.95.180 – 10.78.95.180	10.78.95.180
54	10.78.95.181/32	10.78.95.181 – 10.78.95.181	10.78.95.181
55	10.78.95.182/32	10.78.95.182 – 10.78.95.182	10.78.95.182
56	10.78.95.183/32	10.78.95.183 – 10.78.95.183	10.78.95.183
57	10.78.95.184/32	10.78.95.184 – 10.78.95.184	10.78.95.184
58	10.78.95.185/32	10.78.95.185 – 10.78.95.185	10.78.95.185
59	10.78.95.186/32	10.78.95.186 – 10.78.95.186	10.78.95.186
60	10.78.95.187/32	10.78.95.187 – 10.78.95.187	10.78.95.187
61	10.78.95.188/32	10.78.95.188 – 10.78.95.188	10.78.95.188
62	10.78.95.189/32	10.78.95.189 – 10.78.95.189	10.78.95.189
63	10.78.95.190/32	10.78.95.190 – 10.78.95.190	10.78.95.190
64	10.78.95.191/32	10.78.95.191 – 10.78.95.191	10.78.95.191
65	10.78.95.192/32	10.78.95.192 – 10.78.95.192	10.78.95.192
66	10.78.95.193/32	10.78.95.193 – 10.78.95.193	10.78.95.193
67	10.78.95.194/32	10.78.95.194 – 10.78.95.194	10.78.95.194
68	10.78.95.195/32	10.78.95.195 – 10.78.95.195	10.78.95.195
69	10.78.95.196/32	10.78.95.196 – 10.78.95.196	10.78.95.196
70	10.78.95.197/32	10.78.95.197 – 10.78.95.197	10.78.95.197
71	10.78.95.198/32	10.78.95.198 – 10.78.95.198	10.78.95.198
72	10.78.95.199/32	10.78.95.199 – 10.78.95.199	10.78.95.199
73	10.78.95.200/32	10.78.95.200 – 10.78.95.200	10.78.95.200
74	10.78.95.201/32	10.78.95.201 – 10.78.95.201	10.78.95.201
75	10.78.95.202/32	10.78.95.202 – 10.78.95.202	10.78.95.202
76	10.78.95.203/32	10.78.95.203 – 10.78.95.203	10.78.95.203
77	10.78.95.204/32	10.78.95.204 – 10.78.95.204	10.78.95.204
78	10.78.95.205/32	10.78.95.205 – 10.78.95.205	10.78.95.205
79	10.78.95.206/32	10.78.95.206 – 10.78.95.206	10.78.95.206
80	10.78.95.207/32	10.78.95.207 – 10.78.95.207	10.78.95.207
81	10.78.95.208/32	10.78.95.208 – 10.78.95.208	10.78.95.208
82	10.78.95.209/32	10.78.95.209 – 10.78.95.209	10.78.95.209
83	10.78.95.210/32	10.78.95.210 – 10.78.95.210	10.78.95.210
84	10.78.95.211/32	10.78.95.211 – 10.78.95.211	10.78.95.211
85	10.78.95.212/32	10.78.95.212 – 10.78.95.212	10.78.95.212
86	10.78.95.213/32	10.78.95.213 – 10.78.95.213	10.78.95.213
87	10.78.95.214/32	10.78.95.214 – 10.78.95.214	10.78.95.214
88	10.78.95.215/32	10.78.95.215 – 10.78.95.215	10.78.95.215
89	10.78.95.216/32	10.78.95.216 – 10.78.95.216	10.78.95.216
90	10.78.95.217/32	10.78.95.217 – 10.78.95.217	10.78.95.217
91	10.78.95.218/32	10.78.95.218 – 10.78.95.218	10.78.95.218
92	10.78.95.219/32	10.78.95.219 – 10.78.95.219	10.78.95.219
93	10.78.95.220/32	10.78.95.220 – 10.78.95.220	10.78.95.220
94	10.78.95.221/32	10.78.95.221 – 10.78.95.221	10.78.95.221
95	10.78.95.222/32	10.78.95.222 – 10.78.95.222	10.78.95.222
96	10.78.95.223/32	10.78.95.223 – 10.78.95.223	10.78.95.223
97	10.78.95.224/32	10.78.95.224 – 10.78.95.224	10.78.95.224
98	10.78.95.225/32	10.78.95.225 – 10.78.95.225	10.78.95.225
99	10.78.95.226/32	10.78.95.226 – 10.78.95.226	10.78.95.226
100	10.78.95.227/32	10.78.95.227 – 10.78.95.227	10.78.95.227
101	10.78.95.228/32	10.78.95.228 – 10.78.95.228	10.78.95.228
102	10.78.95.229/32	10.78.95.229 – 10.78.95.229	10.78.95.229
103	10.78.95.230/32	10.78.95.230 – 10.78.95.230	10.78.95.230
104	10.78.95.231/32	10.78.95.231 – 10.78.95.231	10.78.95.231
105	10.78.95.232/32	10.78.95.232 – 10.78.95.232	10.78.95.232
106	10.78.95.233/32	10.78.95.233 – 10.78.95.233	10.78.95.233
107	10.78.95.234/32	10.78.95.234 – 10.78.95.234	10.78.95.234
108	10.78.95.235/32	10.78.95.235 – 10.78.95.235	10.78.95.235
109	10.78.95.236/32	10.78.95.236 – 10.78.95.236	10.78.95.236
110	10.78.95.237/32	10.78.95.237 – 10.78.95.237	10.78.95.237
111	10.78.95.238/32	10.78.95.238 – 10.78.95.238	10.78.95.238
112	10.78.95.239/32	10.78.95.239 – 10.78.95.239	10.78.95.239
113	10.78.95.240/32	10.78.95.240 – 10.78.95.240	10.78.95.240
114	10.78.95.241/32	10.78.95.241 – 10.78.95.241	10.78.95.241
115	10.78.95.242/32	10.78.95.242 – 10.78.95.242	10.78.95.242
116	10.78.95.243/32	10.78.95.243 – 10.78.95.243	10.78.95.243
117	10.78.95.244/32	10.78.95.244 – 10.78.95.244	10.78.95.244
118	10.78.95.245/32	10.78.95.245 – 10.78.95.245	10.78.95.245
119	10.78.95.246/32	10.78.95.246 – 10.78.95.246	10.78.95.246
120	10.78.95.247/32	10.78.95.247 – 10.78.95.247	10.78.95.247
121	10.78.95.248/32	10.78.95.248 – 10.78.95.248	10.78.95.248
122	10.78.95.249/32	10.78.95.249 – 10.78.95.249	10.78.95.249
123	10.78.95.250/32	10.78.95.250 – 10.78.95.250	10.78.95.250
124	10.78.95.251/32	10.78.95.251 – 10.78.95.251	10.78.95.251
125	10.78.95.252/32	10.78.95.252 – 10.78.95.252	10.78.95.252
126	10.78.95.253/32	10.78.95.253 – 10.78.95.253	10.78.95.253
127	10.78.95.254/32	10.78.95.254 – 10.78.95.254	10.78.95.254
128	10.78.95.255/32	10.78.95.255 – 10.78.95.255	10.78.95.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /25
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	-
/25	255.255.255.128	128	126	1
/26	255.255.255.192	64	62	2 split →
/27	255.255.255.224	32	30	4 split →
/28	255.255.255.240	16	14	8 split →
/29	255.255.255.248	8	6	16 split →
/30	255.255.255.252	4	2	32 split →
/31	255.255.255.254	2	2	64 split →
/32	255.255.255.255	1	1	128 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →